Impact of Low-E Window Films on Energy Consumption

 Glass windows are generally thermally emissive and hence during the daytime, there is always a possibility of solar heat heating up a room's interior. Such solar heat gain can have a major impact on the comfort levels of people staying inside and also increases the total cooling costs of the building. Especially office spaces where the use of glass windows is prominent. It is estimated that typically, as much as 30-40% of the total cooling cost of a building with large glass windows, is due to the solar heat gains due to windows.

 

Low Emittance or Low E-Window Films is one of the simplest ways to tackle this problem. Low-E window films have metallic coatings or dyes that allow lower transmission of solar heat through the window that reduces heat gain inside the building. Thus, by simply applying Low-E thin films to window glass, one can drastically reduce the solar heat gain and thereby reduce the energy consumption of the building. It leads to greater comfort of people inside the building, an increase in productivity, lower electricity costs, and thereby increases profits.

 

How do Low-E Window Films result in saving energy consumption?

 

Low-E Window films block infrared rays from the sunlight preventing these rays to enter through the glass windows. The lower the infrared rays entering/leaving your rooms through glass windows, the lower is the heating/cooling energy required, thereby saving heating/cooling costs considerably. In addition to blocking infrared rays, the Low-E Window Films also prevent the harmful UV radiation from passing through the glass windows. This helps prevent sun damage to furniture, clothes, carpets, floors, and most importantly your skin.

 

Insulation all-round the year

 

If you buy the product from a high-quality Low E glass processing company, you can be assured that the design of the films retains heat during winter and cool air during summer thereby working as a perfect insulator all-round the year. These films provide increased insulation performance. The impact of such films is much like upgrading from single to multi-pane windows.

 

Most modern buildings, especially offices use Low-E glass films on their office windows to not only save their employees from exposure to the sun but also save on their monthly electricity bills.

 

Return on Investment / Payback

 

Low-E Glass Window Films is a perfect technology to non-intrusively cut energy used in cooling buildings at an extremely attractive return on investments. The exact payback calculations can be done based on the area of the glass window, the thickness of the window, the amount of sunlight typically received on the window, and so on. Typically, a good quality Low-E window film can give payback in as low as 3 years.

 

Energy Savings

 

Typically, Low-E glass window films can save as much as $ 1 to $ 2 per square foot of the film installed. In energy terms, you can save as much as 19 kWh per square foot of the glass by installing the right kind of E-glass film.

 

 

Sustainability:

Out of all the ways to reduce energy consumption in a building with glasses, the use of Low-E glass films is the most sustainable solution. You do not need to install new glass windows or install additional machinery for cooling. You can apply a Low-E glass film on the same windows. Many Low-E glass-processing companies offer high-quality Low-E films that can become carbon neutral in as low as 6 months, thereby adding to sustainability.

Low-E glass window coating is one of the fastest-growing sectors in the glass processing industry and the trend is expected to continue in the future. 

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